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Foglights On With High Beams

Spurshot
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Billy 2497 New Member

Billy 2497

Posted
Posted
On 7/12/2014 at 3:19 PM, Spurshot said:

There's a Radio Shack on the west side of 23 by Walmart if you don't want to wait.

 

I know it's a 6 year old thread but couldn't help but notice that RadioShack you're talking about is the same one that closed lol, now it's an AT&T store 

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Spurshot
Spurshot

2014 SIERRA SLT FOG LIGHTS WITH HIGH BEAM HEADLIGHTS MODIFICATION This mod will let you use the fog lights on low beam same as factory. On and off with the fog light button. When the fog ligh

Spurshot
Spurshot

This was on the Duramax forum. I believe it is for a GMT 900. But the principles are likely applicable to a K2. Use this information cautiously. ------------------------------------------------------

Spurshot
Spurshot

OK, After struggling thru the schematics and online mods of past models all evening, I figured it out. This is for a Sierra and should be the same for the Silverado. It involves pushing one Diode in

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Ravenkeeper Senior Enthusiast

Ravenkeeper

Posted
Posted
On 5/6/2020 at 12:44 AM, Billy 2497 said:

I know it's a 6 year old thread but couldn't help but notice that RadioShack you're talking about is the same one that closed lol, now it's an AT&T store 

A bunch of them have closed, including the one in Mojave, CA, and at the Antelope Valley Mall in Palmdale.

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Billy 2497 New Member

Billy 2497

Posted
Posted
32 minutes ago, Ravenkeeper said:

A bunch of them have closed, including the one in Mojave, CA, and at the Antelope Valley Mall in Palmdale.

Not surprised. I just got 10 of those diode rectifiers on Ebay for $1.79 lol

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  • 2 months later...
  • 3 months later...
George Androulakis Enthusiast

George Androulakis

Posted
Posted

SO I tried this this afternoon. Thought I was doing everything right, but it just doesn't work. Lights still operate as normal.

 

These are the diodes i bought from amazon:

 

https://www.amazon.ca/gp/product/B008UFX95U/ref=ppx_yo_dt_b_asin_title_o07_s01?ie=UTF8&psc=1

 

I tried the 10-22 jump with the stripe facing pin 22. On my 17 Silverado, seems like the #10 wire is brown and the 22 is blue. Am I doing something wrong, or did I get the wrong diodes or what? 

 

Help!!!!

 

Thanks,


George

Ravenkeeper Senior Enthusiast

Ravenkeeper

Posted
Posted (edited)
On 10/28/2020 at 10:48 AM, George Androulakis said:

SO I tried this this afternoon. Thought I was doing everything right, but it just doesn't work. Lights still operate as normal.

 

These are the diodes i bought from amazon:

 

https://www.amazon.ca/gp/product/B008UFX95U/ref=ppx_yo_dt_b_asin_title_o07_s01?ie=UTF8&psc=1

 

I tried the 10-22 jump with the stripe facing pin 22. On my 17 Silverado, seems like the #10 wire is brown and the 22 is blue. Am I doing something wrong, or did I get the wrong diodes or what? 

 

Help!!!!

 

Thanks,


George

George,

 

    Post a picture of your BCM, please.  I run 1N4004 diode from hi-beam (stripe, BCM-BRN-18) to fogs (BCM-BRN-10). For yours, stripe end in 22, and other end in 10.

 

 

BCM Lights.jpg

Edited by Ravenkeeper
George Androulakis Enthusiast

George Androulakis

Posted
Posted (edited)

That's what ive been trying to do, but just using the legs of the diode, not t-taping the factory wiring. Maybe its just not going in deep enough to make the electrical connections?

 

See pics below. 

 

Thanks!

 

George

 

IMG_5436 copy.jpg

Edited by George Androulakis
Ravenkeeper Senior Enthusiast

Ravenkeeper

Posted
Posted
12 hours ago, George Androulakis said:

That's what ive been trying to do, but just using the legs of the diode, not t-taping the factory wiring. Maybe its just not going in deep enough to make the electrical connections?

 

See pics below. 

 

Thanks!

 

George

 

IMG_5436 copy.jpg

Yeah, your "non-striped end" is NOT in far enough.  I used the smallest cross-tip jewelers screwdriver I have to work a path into each slot, beside the pin.  Run the lead down the same corner that you made the path.  Run the lead as straight as possible to get it in.  Yours looks weaved through the wires.

George Androulakis Enthusiast

George Androulakis

Posted
Posted

So Thanks to your help, I got it working!

 

What I ended up doing was getting some sold core 18ga wire I had laying around and making two pigtails, Stripped the wire about 5/8 of an inch on each side, and inserted them into the BCM connector. They went further than I thought. Then I soldered each end of the diode to the pigtail. Taped the pigtails to the wire loom going to the brown connector, wrapped the diode in tape and taped that to the outside of the harness. Best of all, it works! I now have fogs on with parking lights etc.... 

 

Thanks again for all the advice / help!

 

George

IMG_5483 copy.jpg

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High Seirra 4x4 New Member

High Seirra 4x4

Posted
Posted
On 10/31/2020 at 1:42 PM, George Androulakis said:

So Thanks to your help, I got it working!

 

What I ended up doing was getting some sold core 18ga wire I had laying around and making two pigtails, Stripped the wire about 5/8 of an inch on each side, and inserted them into the BCM connector. They went further than I thought. Then I soldered each end of the diode to the pigtail. Taped the pigtails to the wire loom going to the brown connector, wrapped the diode in tape and taped that to the outside of the harness. Best of all, it works! I now have fogs on with parking lights etc.... 

 

Thanks again for all the advice / help!

 

George

IMG_5483 copy.jpg

Will be giving the a try soon.  Thanks!

 

  • 2 weeks later...
High Seirra 4x4 New Member

High Seirra 4x4

Posted
Posted

Took me about 10 minutes as it is a tight work space and I bent the wires on the first diode trying to get them in the plug.  Tried the 2nd diode and had it working shortly.  I did the #10 to #22 jump.

 

Thanks for all the write ups, pics and tips.

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  • 1 year later...
JonAllen356 New Member

JonAllen356

Posted
Posted (edited)

The thread's been dormant for a couple years, but why not revive it and ask a question that I haven't seen yet...

 

Is there a configuration that would automatically put fogs on while the low beams are active but turn them off when high beams are active? Could this be done and also preserve the ability to turn them on or off using the manual button?

 

I like the additional low light of the fogs, particularly how they light up the immediate road while I'm making a turn. I often turn them on manually, but would prefer to have them turn on automatically. However, I don't want them on while the high-beams are active because I drive in states where that is illegal. So the 10-18 and 10-22 mods don't work because they pair the fogs up with the highs (if I'm understanding correctly). 

 

I did find a thread from a guy named Coby7 that said he accomplished it by "adding diodes between H4 and K2 to C2 ( Cathode at C2 of course ) of connector 4 of the underhood fuse block" but he didn't post any pictures or a diagram for where those connections are. It is found at: 

 

 

I drive a 2018 GMC Sierra 1500 Texas Edition

Edited by JonAllen356
  • 3 weeks later...
Ravenkeeper Senior Enthusiast

Ravenkeeper

Posted
Posted
On 1/19/2023 at 9:27 AM, JonAllen356 said:

The thread's been dormant for a couple years, but why not revive it and ask a question that I haven't seen yet...

 

Is there a configuration that would automatically put fogs on while the low beams are active but turn them off when high beams are active? Could this be done and also preserve the ability to turn them on or off using the manual button?

 

I like the additional low light of the fogs, particularly how they light up the immediate road while I'm making a turn. I often turn them on manually, but would prefer to have them turn on automatically. However, I don't want them on while the high-beams are active because I drive in states where that is illegal. So the 10-18 and 10-22 mods don't work because they pair the fogs up with the highs (if I'm understanding correctly). 

 

I did find a thread from a guy named Coby7 that said he accomplished it by "adding diodes between H4 and K2 to C2 ( Cathode at C2 of course ) of connector 4 of the underhood fuse block" but he didn't post any pictures or a diagram for where those connections are. It is found at: 

 

 

I drive a 2018 GMC Sierra 1500 Texas Edition

18-10 is Fogs with Highs (I have)

22-10 is Fogs with Running/Parking Lights

If you strictly want Fogs on with low beams, jumper the diode with non-stripe on 10 and the striped end on either 1 or 2.

 

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JonAllen356 New Member

JonAllen356

Posted
Posted
7 hours ago, Ravenkeeper said:

18-10 is Fogs with Highs (I have)

22-10 is Fogs with Running/Parking Lights

If you strictly want Fogs on with low beams, jumper the diode with non-stripe on 10 and the striped end on either 1 or 2.

 

 

Great! I wasn't sure if it was going to be possible. I ordered the diodes and will give it a try next week. Should have plenty of attempts at it since the cheapest thing on Amazon was a 100 pack...

  • Like 2
MikeBMW Senior Enthusiast

MikeBMW

Posted
Posted (edited)

I did this a few years ago without any mods.
I got the BTDiesel Autosync OBD dongle and connected it to the BTDiesel site for modding a few hundred BCM items as well as a few HMI mods.
Options are amazing (changed the rear lock out button to rolling up all windows, for one)
Anyway, this method in the thread is, certainly, a lot less expensive.
 

 

Edited by MikeBMW

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